📝 Remove vim code block annotation

It seems `vim` code block annotation cause 500 error on
denoland/docland. I'm not sure if this is the reason why documentation
of denops_std is not generated but try

  [uncaught application error]: Error - Unknown language: `vim` is not registered

  request: {
    url: "http://0.0.0.0:8080/https://raw.githubusercontent.com/vim-denops/deno-denops-std/main/argument/mod.t"... 1 more character,
    method: "GET",
    hasBody: false
  }
  response: { status: 500, type: "html", hasBody: true, writable: true }

      at a (https://esm.sh/v91/fault@2.0.1/denonext/fault.mjs:2:312)
      at Object.u [as highlight] (https://esm.sh/v91/lowlight@2.4.1/denonext/lowlight.mjs:2:2820)
      at syntaxHighlight (file:///Users/alisue/ghq/github.com/denoland/docland/components/common.tsx:148:27)
      at MarkdownBlock (file:///Users/alisue/ghq/github.com/denoland/docland/components/markdown.tsx:101:28)
      at renderFunctionalComponent (https://deno.land/x/nano_jsx@v0.0.33/core.ts:160:18)
      at _render (https://deno.land/x/nano_jsx@v0.0.33/core.ts:134:70)
      at https://deno.land/x/nano_jsx@v0.0.33/core.ts:46:17
      at Array.forEach (<anonymous>)
      at appendChildren (https://deno.land/x/nano_jsx@v0.0.33/core.ts:41:12)
      at h (https://deno.land/x/nano_jsx@v0.0.33/core.ts:286:3)
  [error] Error: Unknown language: `vim` is not registered

      at a (https://esm.sh/v91/fault@2.0.1/denonext/fault.mjs:2:312)
      at Object.u [as highlight] (https://esm.sh/v91/lowlight@2.4.1/denonext/lowlight.mjs:2:2820)
      at syntaxHighlight (file:///Users/alisue/ghq/github.com/denoland/docland/components/common.tsx:148:27)
      at MarkdownBlock (file:///Users/alisue/ghq/github.com/denoland/docland/components/markdown.tsx:101:28)
      at renderFunctionalComponent (https://deno.land/x/nano_jsx@v0.0.33/core.ts:160:18)
      at _render (https://deno.land/x/nano_jsx@v0.0.33/core.ts:134:70)
      at https://deno.land/x/nano_jsx@v0.0.33/core.ts:46:17
      at Array.forEach (<anonymous>)
      at appendChildren (https://deno.land/x/nano_jsx@v0.0.33/core.ts:41:12)
      at h (https://deno.land/x/nano_jsx@v0.0.33/core.ts:286:3)

Author: lambdalisue

argument/mod.ts

@@ -1,7 +1,7 @@
 /**
  * A module to handle Vim's command arguments like the followings.
  *
- * ```vim
+ * ```
  * :MyCommand ++enc=sjis ++ff=dos -f --foo=foo --bar=bar --bar=baz hello world
  * ```
  *
@@ -10,7 +10,7 @@
  *
  * For example:
  *
- * ```vim
+ * ```
  * command! -nargs=* MyCommand call denops#request("myplugin", "test", [[<f-args>]])
  * ```
  *
@@ -60,6 +60,7 @@
  *   };
  * }
  * ```
+ *
  * @module
  */
 import { Opts, parseOpts } from "./opts.ts";